docs(fleet): add operator configuration guide (#789)

docs/fleet/examples/roster-v2.yaml

@@ -0,0 +1,61 @@
+version: 2
+generation: 1
+transport: tmux
+tmux:
+  socket_name: mosaic-fleet
+  holder_session: _holder
+defaults:
+  working_directory: ~/src
+  runtime: pi
+runtimes:
+  pi:
+    reset_command: /new
+agents:
+  - name: code-example
+    alias: Code Example
+    class: code
+    runtime: pi
+    provider: example-provider
+    model: example-model
+    reasoning: medium
+    tool_policy: code
+    working_directory: ~/src
+    persistent_persona: false
+    reset_between_tasks: true
+    lifecycle:
+      enabled: true
+      desired_state: stopped
+    launch:
+      yolo: false
+  - name: interaction-example
+    alias: Interaction Example
+    class: interaction
+    runtime: pi
+    provider: example-provider
+    model: example-model
+    reasoning: low
+    tool_policy: interaction
+    working_directory: ~/src
+    persistent_persona: true
+    reset_between_tasks: false
+    lifecycle:
+      enabled: true
+      desired_state: stopped
+    launch:
+      yolo: false
+  - name: validator-example
+    alias: Validator Example
+    class: validator
+    runtime: pi
+    provider: example-provider
+    model: example-model
+    reasoning: high
+    tool_policy: validator
+    working_directory: ~/src
+    persistent_persona: false
+    reset_between_tasks: true
+    lifecycle:
+      enabled: true
+      desired_state: stopped
+    launch:
+      yolo: false